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-rw-r--r--arch/microblaze/kernel/prom_parse.c1025
1 files changed, 1025 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/prom_parse.c b/arch/microblaze/kernel/prom_parse.c
new file mode 100644
index 000000000000..ae0352ecd5a9
--- /dev/null
+++ b/arch/microblaze/kernel/prom_parse.c
@@ -0,0 +1,1025 @@
1#undef DEBUG
2
3#include <linux/kernel.h>
4#include <linux/string.h>
5#include <linux/pci_regs.h>
6#include <linux/module.h>
7#include <linux/ioport.h>
8#include <linux/etherdevice.h>
9#include <asm/prom.h>
10#include <asm/pci-bridge.h>
11
12#define PRu64 "%llx"
13
14/* Max address size we deal with */
15#define OF_MAX_ADDR_CELLS 4
16#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
17 (ns) > 0)
18
19static struct of_bus *of_match_bus(struct device_node *np);
20static int __of_address_to_resource(struct device_node *dev,
21 const u32 *addrp, u64 size, unsigned int flags,
22 struct resource *r);
23
24/* Debug utility */
25#ifdef DEBUG
26static void of_dump_addr(const char *s, const u32 *addr, int na)
27{
28 printk(KERN_INFO "%s", s);
29 while (na--)
30 printk(KERN_INFO " %08x", *(addr++));
31 printk(KERN_INFO "\n");
32}
33#else
34static void of_dump_addr(const char *s, const u32 *addr, int na) { }
35#endif
36
37/* Callbacks for bus specific translators */
38struct of_bus {
39 const char *name;
40 const char *addresses;
41 int (*match)(struct device_node *parent);
42 void (*count_cells)(struct device_node *child,
43 int *addrc, int *sizec);
44 u64 (*map)(u32 *addr, const u32 *range,
45 int na, int ns, int pna);
46 int (*translate)(u32 *addr, u64 offset, int na);
47 unsigned int (*get_flags)(const u32 *addr);
48};
49
50/*
51 * Default translator (generic bus)
52 */
53
54static void of_bus_default_count_cells(struct device_node *dev,
55 int *addrc, int *sizec)
56{
57 if (addrc)
58 *addrc = of_n_addr_cells(dev);
59 if (sizec)
60 *sizec = of_n_size_cells(dev);
61}
62
63static u64 of_bus_default_map(u32 *addr, const u32 *range,
64 int na, int ns, int pna)
65{
66 u64 cp, s, da;
67
68 cp = of_read_number(range, na);
69 s = of_read_number(range + na + pna, ns);
70 da = of_read_number(addr, na);
71
72 pr_debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
73 cp, s, da);
74
75 if (da < cp || da >= (cp + s))
76 return OF_BAD_ADDR;
77 return da - cp;
78}
79
80static int of_bus_default_translate(u32 *addr, u64 offset, int na)
81{
82 u64 a = of_read_number(addr, na);
83 memset(addr, 0, na * 4);
84 a += offset;
85 if (na > 1)
86 addr[na - 2] = a >> 32;
87 addr[na - 1] = a & 0xffffffffu;
88
89 return 0;
90}
91
92static unsigned int of_bus_default_get_flags(const u32 *addr)
93{
94 return IORESOURCE_MEM;
95}
96
97#ifdef CONFIG_PCI
98/*
99 * PCI bus specific translator
100 */
101
102static int of_bus_pci_match(struct device_node *np)
103{
104 /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
105 return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
106}
107
108static void of_bus_pci_count_cells(struct device_node *np,
109 int *addrc, int *sizec)
110{
111 if (addrc)
112 *addrc = 3;
113 if (sizec)
114 *sizec = 2;
115}
116
117static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
118{
119 u64 cp, s, da;
120
121 /* Check address type match */
122 if ((addr[0] ^ range[0]) & 0x03000000)
123 return OF_BAD_ADDR;
124
125 /* Read address values, skipping high cell */
126 cp = of_read_number(range + 1, na - 1);
127 s = of_read_number(range + na + pna, ns);
128 da = of_read_number(addr + 1, na - 1);
129
130 pr_debug("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
131
132 if (da < cp || da >= (cp + s))
133 return OF_BAD_ADDR;
134 return da - cp;
135}
136
137static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
138{
139 return of_bus_default_translate(addr + 1, offset, na - 1);
140}
141
142static unsigned int of_bus_pci_get_flags(const u32 *addr)
143{
144 unsigned int flags = 0;
145 u32 w = addr[0];
146
147 switch ((w >> 24) & 0x03) {
148 case 0x01:
149 flags |= IORESOURCE_IO;
150 break;
151 case 0x02: /* 32 bits */
152 case 0x03: /* 64 bits */
153 flags |= IORESOURCE_MEM;
154 break;
155 }
156 if (w & 0x40000000)
157 flags |= IORESOURCE_PREFETCH;
158 return flags;
159}
160
161const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
162 unsigned int *flags)
163{
164 const u32 *prop;
165 unsigned int psize;
166 struct device_node *parent;
167 struct of_bus *bus;
168 int onesize, i, na, ns;
169
170 /* Get parent & match bus type */
171 parent = of_get_parent(dev);
172 if (parent == NULL)
173 return NULL;
174 bus = of_match_bus(parent);
175 if (strcmp(bus->name, "pci")) {
176 of_node_put(parent);
177 return NULL;
178 }
179 bus->count_cells(dev, &na, &ns);
180 of_node_put(parent);
181 if (!OF_CHECK_COUNTS(na, ns))
182 return NULL;
183
184 /* Get "reg" or "assigned-addresses" property */
185 prop = of_get_property(dev, bus->addresses, &psize);
186 if (prop == NULL)
187 return NULL;
188 psize /= 4;
189
190 onesize = na + ns;
191 for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
192 if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
193 if (size)
194 *size = of_read_number(prop + na, ns);
195 if (flags)
196 *flags = bus->get_flags(prop);
197 return prop;
198 }
199 return NULL;
200}
201EXPORT_SYMBOL(of_get_pci_address);
202
203int of_pci_address_to_resource(struct device_node *dev, int bar,
204 struct resource *r)
205{
206 const u32 *addrp;
207 u64 size;
208 unsigned int flags;
209
210 addrp = of_get_pci_address(dev, bar, &size, &flags);
211 if (addrp == NULL)
212 return -EINVAL;
213 return __of_address_to_resource(dev, addrp, size, flags, r);
214}
215EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
216
217static u8 of_irq_pci_swizzle(u8 slot, u8 pin)
218{
219 return (((pin - 1) + slot) % 4) + 1;
220}
221
222int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
223{
224 struct device_node *dn, *ppnode;
225 struct pci_dev *ppdev;
226 u32 lspec;
227 u32 laddr[3];
228 u8 pin;
229 int rc;
230
231 /* Check if we have a device node, if yes, fallback to standard OF
232 * parsing
233 */
234 dn = pci_device_to_OF_node(pdev);
235 if (dn)
236 return of_irq_map_one(dn, 0, out_irq);
237
238 /* Ok, we don't, time to have fun. Let's start by building up an
239 * interrupt spec. we assume #interrupt-cells is 1, which is standard
240 * for PCI. If you do different, then don't use that routine.
241 */
242 rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
243 if (rc != 0)
244 return rc;
245 /* No pin, exit */
246 if (pin == 0)
247 return -ENODEV;
248
249 /* Now we walk up the PCI tree */
250 lspec = pin;
251 for (;;) {
252 /* Get the pci_dev of our parent */
253 ppdev = pdev->bus->self;
254
255 /* Ouch, it's a host bridge... */
256 if (ppdev == NULL) {
257 struct pci_controller *host;
258 host = pci_bus_to_host(pdev->bus);
259 ppnode = host ? host->arch_data : NULL;
260 /* No node for host bridge ? give up */
261 if (ppnode == NULL)
262 return -EINVAL;
263 } else
264 /* We found a P2P bridge, check if it has a node */
265 ppnode = pci_device_to_OF_node(ppdev);
266
267 /* Ok, we have found a parent with a device-node, hand over to
268 * the OF parsing code.
269 * We build a unit address from the linux device to be used for
270 * resolution. Note that we use the linux bus number which may
271 * not match your firmware bus numbering.
272 * Fortunately, in most cases, interrupt-map-mask doesn't
273 * include the bus number as part of the matching.
274 * You should still be careful about that though if you intend
275 * to rely on this function (you ship a firmware that doesn't
276 * create device nodes for all PCI devices).
277 */
278 if (ppnode)
279 break;
280
281 /* We can only get here if we hit a P2P bridge with no node,
282 * let's do standard swizzling and try again
283 */
284 lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec);
285 pdev = ppdev;
286 }
287
288 laddr[0] = (pdev->bus->number << 16)
289 | (pdev->devfn << 8);
290 laddr[1] = laddr[2] = 0;
291 return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
292}
293EXPORT_SYMBOL_GPL(of_irq_map_pci);
294#endif /* CONFIG_PCI */
295
296/*
297 * ISA bus specific translator
298 */
299
300static int of_bus_isa_match(struct device_node *np)
301{
302 return !strcmp(np->name, "isa");
303}
304
305static void of_bus_isa_count_cells(struct device_node *child,
306 int *addrc, int *sizec)
307{
308 if (addrc)
309 *addrc = 2;
310 if (sizec)
311 *sizec = 1;
312}
313
314static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna)
315{
316 u64 cp, s, da;
317
318 /* Check address type match */
319 if ((addr[0] ^ range[0]) & 0x00000001)
320 return OF_BAD_ADDR;
321
322 /* Read address values, skipping high cell */
323 cp = of_read_number(range + 1, na - 1);
324 s = of_read_number(range + na + pna, ns);
325 da = of_read_number(addr + 1, na - 1);
326
327 pr_debug("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
328
329 if (da < cp || da >= (cp + s))
330 return OF_BAD_ADDR;
331 return da - cp;
332}
333
334static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
335{
336 return of_bus_default_translate(addr + 1, offset, na - 1);
337}
338
339static unsigned int of_bus_isa_get_flags(const u32 *addr)
340{
341 unsigned int flags = 0;
342 u32 w = addr[0];
343
344 if (w & 1)
345 flags |= IORESOURCE_IO;
346 else
347 flags |= IORESOURCE_MEM;
348 return flags;
349}
350
351/*
352 * Array of bus specific translators
353 */
354
355static struct of_bus of_busses[] = {
356#ifdef CONFIG_PCI
357 /* PCI */
358 {
359 .name = "pci",
360 .addresses = "assigned-addresses",
361 .match = of_bus_pci_match,
362 .count_cells = of_bus_pci_count_cells,
363 .map = of_bus_pci_map,
364 .translate = of_bus_pci_translate,
365 .get_flags = of_bus_pci_get_flags,
366 },
367#endif /* CONFIG_PCI */
368 /* ISA */
369 {
370 .name = "isa",
371 .addresses = "reg",
372 .match = of_bus_isa_match,
373 .count_cells = of_bus_isa_count_cells,
374 .map = of_bus_isa_map,
375 .translate = of_bus_isa_translate,
376 .get_flags = of_bus_isa_get_flags,
377 },
378 /* Default */
379 {
380 .name = "default",
381 .addresses = "reg",
382 .match = NULL,
383 .count_cells = of_bus_default_count_cells,
384 .map = of_bus_default_map,
385 .translate = of_bus_default_translate,
386 .get_flags = of_bus_default_get_flags,
387 },
388};
389
390static struct of_bus *of_match_bus(struct device_node *np)
391{
392 int i;
393
394 for (i = 0; i < ARRAY_SIZE(of_busses); i++)
395 if (!of_busses[i].match || of_busses[i].match(np))
396 return &of_busses[i];
397 BUG();
398 return NULL;
399}
400
401static int of_translate_one(struct device_node *parent, struct of_bus *bus,
402 struct of_bus *pbus, u32 *addr,
403 int na, int ns, int pna)
404{
405 const u32 *ranges;
406 unsigned int rlen;
407 int rone;
408 u64 offset = OF_BAD_ADDR;
409
410 /* Normally, an absence of a "ranges" property means we are
411 * crossing a non-translatable boundary, and thus the addresses
412 * below the current not cannot be converted to CPU physical ones.
413 * Unfortunately, while this is very clear in the spec, it's not
414 * what Apple understood, and they do have things like /uni-n or
415 * /ht nodes with no "ranges" property and a lot of perfectly
416 * useable mapped devices below them. Thus we treat the absence of
417 * "ranges" as equivalent to an empty "ranges" property which means
418 * a 1:1 translation at that level. It's up to the caller not to try
419 * to translate addresses that aren't supposed to be translated in
420 * the first place. --BenH.
421 */
422 ranges = of_get_property(parent, "ranges", (int *) &rlen);
423 if (ranges == NULL || rlen == 0) {
424 offset = of_read_number(addr, na);
425 memset(addr, 0, pna * 4);
426 pr_debug("OF: no ranges, 1:1 translation\n");
427 goto finish;
428 }
429
430 pr_debug("OF: walking ranges...\n");
431
432 /* Now walk through the ranges */
433 rlen /= 4;
434 rone = na + pna + ns;
435 for (; rlen >= rone; rlen -= rone, ranges += rone) {
436 offset = bus->map(addr, ranges, na, ns, pna);
437 if (offset != OF_BAD_ADDR)
438 break;
439 }
440 if (offset == OF_BAD_ADDR) {
441 pr_debug("OF: not found !\n");
442 return 1;
443 }
444 memcpy(addr, ranges + na, 4 * pna);
445
446 finish:
447 of_dump_addr("OF: parent translation for:", addr, pna);
448 pr_debug("OF: with offset: "PRu64"\n", offset);
449
450 /* Translate it into parent bus space */
451 return pbus->translate(addr, offset, pna);
452}
453
454/*
455 * Translate an address from the device-tree into a CPU physical address,
456 * this walks up the tree and applies the various bus mappings on the
457 * way.
458 *
459 * Note: We consider that crossing any level with #size-cells == 0 to mean
460 * that translation is impossible (that is we are not dealing with a value
461 * that can be mapped to a cpu physical address). This is not really specified
462 * that way, but this is traditionally the way IBM at least do things
463 */
464u64 of_translate_address(struct device_node *dev, const u32 *in_addr)
465{
466 struct device_node *parent = NULL;
467 struct of_bus *bus, *pbus;
468 u32 addr[OF_MAX_ADDR_CELLS];
469 int na, ns, pna, pns;
470 u64 result = OF_BAD_ADDR;
471
472 pr_debug("OF: ** translation for device %s **\n", dev->full_name);
473
474 /* Increase refcount at current level */
475 of_node_get(dev);
476
477 /* Get parent & match bus type */
478 parent = of_get_parent(dev);
479 if (parent == NULL)
480 goto bail;
481 bus = of_match_bus(parent);
482
483 /* Cound address cells & copy address locally */
484 bus->count_cells(dev, &na, &ns);
485 if (!OF_CHECK_COUNTS(na, ns)) {
486 printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
487 dev->full_name);
488 goto bail;
489 }
490 memcpy(addr, in_addr, na * 4);
491
492 pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
493 bus->name, na, ns, parent->full_name);
494 of_dump_addr("OF: translating address:", addr, na);
495
496 /* Translate */
497 for (;;) {
498 /* Switch to parent bus */
499 of_node_put(dev);
500 dev = parent;
501 parent = of_get_parent(dev);
502
503 /* If root, we have finished */
504 if (parent == NULL) {
505 pr_debug("OF: reached root node\n");
506 result = of_read_number(addr, na);
507 break;
508 }
509
510 /* Get new parent bus and counts */
511 pbus = of_match_bus(parent);
512 pbus->count_cells(dev, &pna, &pns);
513 if (!OF_CHECK_COUNTS(pna, pns)) {
514 printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
515 dev->full_name);
516 break;
517 }
518
519 pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
520 pbus->name, pna, pns, parent->full_name);
521
522 /* Apply bus translation */
523 if (of_translate_one(dev, bus, pbus, addr, na, ns, pna))
524 break;
525
526 /* Complete the move up one level */
527 na = pna;
528 ns = pns;
529 bus = pbus;
530
531 of_dump_addr("OF: one level translation:", addr, na);
532 }
533 bail:
534 of_node_put(parent);
535 of_node_put(dev);
536
537 return result;
538}
539EXPORT_SYMBOL(of_translate_address);
540
541const u32 *of_get_address(struct device_node *dev, int index, u64 *size,
542 unsigned int *flags)
543{
544 const u32 *prop;
545 unsigned int psize;
546 struct device_node *parent;
547 struct of_bus *bus;
548 int onesize, i, na, ns;
549
550 /* Get parent & match bus type */
551 parent = of_get_parent(dev);
552 if (parent == NULL)
553 return NULL;
554 bus = of_match_bus(parent);
555 bus->count_cells(dev, &na, &ns);
556 of_node_put(parent);
557 if (!OF_CHECK_COUNTS(na, ns))
558 return NULL;
559
560 /* Get "reg" or "assigned-addresses" property */
561 prop = of_get_property(dev, bus->addresses, (int *) &psize);
562 if (prop == NULL)
563 return NULL;
564 psize /= 4;
565
566 onesize = na + ns;
567 for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
568 if (i == index) {
569 if (size)
570 *size = of_read_number(prop + na, ns);
571 if (flags)
572 *flags = bus->get_flags(prop);
573 return prop;
574 }
575 return NULL;
576}
577EXPORT_SYMBOL(of_get_address);
578
579static int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
580 u64 size, unsigned int flags,
581 struct resource *r)
582{
583 u64 taddr;
584
585 if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
586 return -EINVAL;
587 taddr = of_translate_address(dev, addrp);
588 if (taddr == OF_BAD_ADDR)
589 return -EINVAL;
590 memset(r, 0, sizeof(struct resource));
591 if (flags & IORESOURCE_IO) {
592 unsigned long port;
593 port = -1; /* pci_address_to_pio(taddr); */
594 if (port == (unsigned long)-1)
595 return -EINVAL;
596 r->start = port;
597 r->end = port + size - 1;
598 } else {
599 r->start = taddr;
600 r->end = taddr + size - 1;
601 }
602 r->flags = flags;
603 r->name = dev->name;
604 return 0;
605}
606
607int of_address_to_resource(struct device_node *dev, int index,
608 struct resource *r)
609{
610 const u32 *addrp;
611 u64 size;
612 unsigned int flags;
613
614 addrp = of_get_address(dev, index, &size, &flags);
615 if (addrp == NULL)
616 return -EINVAL;
617 return __of_address_to_resource(dev, addrp, size, flags, r);
618}
619EXPORT_SYMBOL_GPL(of_address_to_resource);
620
621void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
622 unsigned long *busno, unsigned long *phys, unsigned long *size)
623{
624 const u32 *dma_window;
625 u32 cells;
626 const unsigned char *prop;
627
628 dma_window = dma_window_prop;
629
630 /* busno is always one cell */
631 *busno = *(dma_window++);
632
633 prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
634 if (!prop)
635 prop = of_get_property(dn, "#address-cells", NULL);
636
637 cells = prop ? *(u32 *)prop : of_n_addr_cells(dn);
638 *phys = of_read_number(dma_window, cells);
639
640 dma_window += cells;
641
642 prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
643 cells = prop ? *(u32 *)prop : of_n_size_cells(dn);
644 *size = of_read_number(dma_window, cells);
645}
646
647/*
648 * Interrupt remapper
649 */
650
651static unsigned int of_irq_workarounds;
652static struct device_node *of_irq_dflt_pic;
653
654static struct device_node *of_irq_find_parent(struct device_node *child)
655{
656 struct device_node *p;
657 const phandle *parp;
658
659 if (!of_node_get(child))
660 return NULL;
661
662 do {
663 parp = of_get_property(child, "interrupt-parent", NULL);
664 if (parp == NULL)
665 p = of_get_parent(child);
666 else {
667 if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
668 p = of_node_get(of_irq_dflt_pic);
669 else
670 p = of_find_node_by_phandle(*parp);
671 }
672 of_node_put(child);
673 child = p;
674 } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
675
676 return p;
677}
678
679/* This doesn't need to be called if you don't have any special workaround
680 * flags to pass
681 */
682void of_irq_map_init(unsigned int flags)
683{
684 of_irq_workarounds = flags;
685
686 /* OldWorld, don't bother looking at other things */
687 if (flags & OF_IMAP_OLDWORLD_MAC)
688 return;
689
690 /* If we don't have phandles, let's try to locate a default interrupt
691 * controller (happens when booting with BootX). We do a first match
692 * here, hopefully, that only ever happens on machines with one
693 * controller.
694 */
695 if (flags & OF_IMAP_NO_PHANDLE) {
696 struct device_node *np;
697
698 for (np = NULL; (np = of_find_all_nodes(np)) != NULL;) {
699 if (of_get_property(np, "interrupt-controller", NULL)
700 == NULL)
701 continue;
702 /* Skip /chosen/interrupt-controller */
703 if (strcmp(np->name, "chosen") == 0)
704 continue;
705 /* It seems like at least one person on this planet
706 * wants to use BootX on a machine with an AppleKiwi
707 * controller which happens to pretend to be an
708 * interrupt controller too.
709 */
710 if (strcmp(np->name, "AppleKiwi") == 0)
711 continue;
712 /* I think we found one ! */
713 of_irq_dflt_pic = np;
714 break;
715 }
716 }
717
718}
719
720int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
721 const u32 *addr, struct of_irq *out_irq)
722{
723 struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
724 const u32 *tmp, *imap, *imask;
725 u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
726 int imaplen, match, i;
727
728 pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],"
729 "ointsize=%d\n",
730 parent->full_name, intspec[0], intspec[1], ointsize);
731
732 ipar = of_node_get(parent);
733
734 /* First get the #interrupt-cells property of the current cursor
735 * that tells us how to interpret the passed-in intspec. If there
736 * is none, we are nice and just walk up the tree
737 */
738 do {
739 tmp = of_get_property(ipar, "#interrupt-cells", NULL);
740 if (tmp != NULL) {
741 intsize = *tmp;
742 break;
743 }
744 tnode = ipar;
745 ipar = of_irq_find_parent(ipar);
746 of_node_put(tnode);
747 } while (ipar);
748 if (ipar == NULL) {
749 pr_debug(" -> no parent found !\n");
750 goto fail;
751 }
752
753 pr_debug("of_irq_map_raw: ipar=%s, size=%d\n",
754 ipar->full_name, intsize);
755
756 if (ointsize != intsize)
757 return -EINVAL;
758
759 /* Look for this #address-cells. We have to implement the old linux
760 * trick of looking for the parent here as some device-trees rely on it
761 */
762 old = of_node_get(ipar);
763 do {
764 tmp = of_get_property(old, "#address-cells", NULL);
765 tnode = of_get_parent(old);
766 of_node_put(old);
767 old = tnode;
768 } while (old && tmp == NULL);
769 of_node_put(old);
770 old = NULL;
771 addrsize = (tmp == NULL) ? 2 : *tmp;
772
773 pr_debug(" -> addrsize=%d\n", addrsize);
774
775 /* Now start the actual "proper" walk of the interrupt tree */
776 while (ipar != NULL) {
777 /* Now check if cursor is an interrupt-controller and if it is
778 * then we are done
779 */
780 if (of_get_property(ipar, "interrupt-controller", NULL) !=
781 NULL) {
782 pr_debug(" -> got it !\n");
783 memcpy(out_irq->specifier, intspec,
784 intsize * sizeof(u32));
785 out_irq->size = intsize;
786 out_irq->controller = ipar;
787 of_node_put(old);
788 return 0;
789 }
790
791 /* Now look for an interrupt-map */
792 imap = of_get_property(ipar, "interrupt-map", &imaplen);
793 /* No interrupt map, check for an interrupt parent */
794 if (imap == NULL) {
795 pr_debug(" -> no map, getting parent\n");
796 newpar = of_irq_find_parent(ipar);
797 goto skiplevel;
798 }
799 imaplen /= sizeof(u32);
800
801 /* Look for a mask */
802 imask = of_get_property(ipar, "interrupt-map-mask", NULL);
803
804 /* If we were passed no "reg" property and we attempt to parse
805 * an interrupt-map, then #address-cells must be 0.
806 * Fail if it's not.
807 */
808 if (addr == NULL && addrsize != 0) {
809 pr_debug(" -> no reg passed in when needed !\n");
810 goto fail;
811 }
812
813 /* Parse interrupt-map */
814 match = 0;
815 while (imaplen > (addrsize + intsize + 1) && !match) {
816 /* Compare specifiers */
817 match = 1;
818 for (i = 0; i < addrsize && match; ++i) {
819 u32 mask = imask ? imask[i] : 0xffffffffu;
820 match = ((addr[i] ^ imap[i]) & mask) == 0;
821 }
822 for (; i < (addrsize + intsize) && match; ++i) {
823 u32 mask = imask ? imask[i] : 0xffffffffu;
824 match =
825 ((intspec[i-addrsize] ^ imap[i])
826 & mask) == 0;
827 }
828 imap += addrsize + intsize;
829 imaplen -= addrsize + intsize;
830
831 pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen);
832
833 /* Get the interrupt parent */
834 if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
835 newpar = of_node_get(of_irq_dflt_pic);
836 else
837 newpar =
838 of_find_node_by_phandle((phandle)*imap);
839 imap++;
840 --imaplen;
841
842 /* Check if not found */
843 if (newpar == NULL) {
844 pr_debug(" -> imap parent not found !\n");
845 goto fail;
846 }
847
848 /* Get #interrupt-cells and #address-cells of new
849 * parent
850 */
851 tmp = of_get_property(newpar, "#interrupt-cells", NULL);
852 if (tmp == NULL) {
853 pr_debug(" -> parent lacks "
854 "#interrupt-cells!\n");
855 goto fail;
856 }
857 newintsize = *tmp;
858 tmp = of_get_property(newpar, "#address-cells", NULL);
859 newaddrsize = (tmp == NULL) ? 0 : *tmp;
860
861 pr_debug(" -> newintsize=%d, newaddrsize=%d\n",
862 newintsize, newaddrsize);
863
864 /* Check for malformed properties */
865 if (imaplen < (newaddrsize + newintsize))
866 goto fail;
867
868 imap += newaddrsize + newintsize;
869 imaplen -= newaddrsize + newintsize;
870
871 pr_debug(" -> imaplen=%d\n", imaplen);
872 }
873 if (!match)
874 goto fail;
875
876 of_node_put(old);
877 old = of_node_get(newpar);
878 addrsize = newaddrsize;
879 intsize = newintsize;
880 intspec = imap - intsize;
881 addr = intspec - addrsize;
882
883skiplevel:
884 /* Iterate again with new parent */
885 pr_debug(" -> new parent: %s\n",
886 newpar ? newpar->full_name : "<>");
887 of_node_put(ipar);
888 ipar = newpar;
889 newpar = NULL;
890 }
891fail:
892 of_node_put(ipar);
893 of_node_put(old);
894 of_node_put(newpar);
895
896 return -EINVAL;
897}
898EXPORT_SYMBOL_GPL(of_irq_map_raw);
899
900int of_irq_map_one(struct device_node *device,
901 int index, struct of_irq *out_irq)
902{
903 struct device_node *p;
904 const u32 *intspec, *tmp, *addr;
905 u32 intsize, intlen;
906 int res;
907
908 pr_debug("of_irq_map_one: dev=%s, index=%d\n",
909 device->full_name, index);
910
911 /* Get the interrupts property */
912 intspec = of_get_property(device, "interrupts", (int *) &intlen);
913 if (intspec == NULL)
914 return -EINVAL;
915 intlen /= sizeof(u32);
916
917 pr_debug(" intspec=%d intlen=%d\n", *intspec, intlen);
918
919 /* Get the reg property (if any) */
920 addr = of_get_property(device, "reg", NULL);
921
922 /* Look for the interrupt parent. */
923 p = of_irq_find_parent(device);
924 if (p == NULL)
925 return -EINVAL;
926
927 /* Get size of interrupt specifier */
928 tmp = of_get_property(p, "#interrupt-cells", NULL);
929 if (tmp == NULL) {
930 of_node_put(p);
931 return -EINVAL;
932 }
933 intsize = *tmp;
934
935 pr_debug(" intsize=%d intlen=%d\n", intsize, intlen);
936
937 /* Check index */
938 if ((index + 1) * intsize > intlen)
939 return -EINVAL;
940
941 /* Get new specifier and map it */
942 res = of_irq_map_raw(p, intspec + index * intsize, intsize,
943 addr, out_irq);
944 of_node_put(p);
945 return res;
946}
947EXPORT_SYMBOL_GPL(of_irq_map_one);
948
949/**
950 * Search the device tree for the best MAC address to use. 'mac-address' is
951 * checked first, because that is supposed to contain to "most recent" MAC
952 * address. If that isn't set, then 'local-mac-address' is checked next,
953 * because that is the default address. If that isn't set, then the obsolete
954 * 'address' is checked, just in case we're using an old device tree.
955 *
956 * Note that the 'address' property is supposed to contain a virtual address of
957 * the register set, but some DTS files have redefined that property to be the
958 * MAC address.
959 *
960 * All-zero MAC addresses are rejected, because those could be properties that
961 * exist in the device tree, but were not set by U-Boot. For example, the
962 * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
963 * addresses. Some older U-Boots only initialized 'local-mac-address'. In
964 * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
965 * but is all zeros.
966*/
967const void *of_get_mac_address(struct device_node *np)
968{
969 struct property *pp;
970
971 pp = of_find_property(np, "mac-address", NULL);
972 if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
973 return pp->value;
974
975 pp = of_find_property(np, "local-mac-address", NULL);
976 if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
977 return pp->value;
978
979 pp = of_find_property(np, "address", NULL);
980 if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
981 return pp->value;
982
983 return NULL;
984}
985EXPORT_SYMBOL(of_get_mac_address);
986
987int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
988{
989 struct of_irq out_irq;
990 int irq;
991 int res;
992
993 res = of_irq_map_one(dev, index, &out_irq);
994
995 /* Get irq for the device */
996 if (res) {
997 pr_debug("IRQ not found... code = %d", res);
998 return NO_IRQ;
999 }
1000 /* Assuming single interrupt controller... */
1001 irq = out_irq.specifier[0];
1002
1003 pr_debug("IRQ found = %d", irq);
1004
1005 /* Only dereference the resource if both the
1006 * resource and the irq are valid. */
1007 if (r && irq != NO_IRQ) {
1008 r->start = r->end = irq;
1009 r->flags = IORESOURCE_IRQ;
1010 }
1011
1012 return irq;
1013}
1014EXPORT_SYMBOL_GPL(of_irq_to_resource);
1015
1016void __iomem *of_iomap(struct device_node *np, int index)
1017{
1018 struct resource res;
1019
1020 if (of_address_to_resource(np, index, &res))
1021 return NULL;
1022
1023 return ioremap(res.start, 1 + res.end - res.start);
1024}
1025EXPORT_SYMBOL(of_iomap);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 19:49:58 -0500